HITACHI P42H401, H4011, T501, P50H401, P50H401A Training Manual

DW3 Models 2007 PDP

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P42H401, P40H4011, P40T501, A and Non A 50" 55" and 60" DW3 Chassis
P50H401, P50H4011, P50T501, A and Non A
P55H401, P55H4011, P55T551
P60X901

Any time you are dealing with a Dead Unit or- a unit that will not power up, or, that it will come on but the TV
will protect itself and kill the Va and Vs. Check/confirm the SDR PWBs do not have any shorted Ics on them.

Using a ohmetter in continuity test-looking for shorts - or simply checking resistance, test across each one of
these SMD ceramic capacitors. If any of them is found shorted- the SDR PWB must be replaced.

1

Small caps that will show shorted IF a buffer IC is
shorted, regardless of having a blown up marking or
not.

Each IC will have two of these small SMD caps on
its Vcc line to ground.

Sometimes there will be some blown up holes or markings, however this may not be evident every time.

It is always recommended that you TEST with an ohmeter all IC Vcc small SMD caps for shorts, if you find
any of them shorted-then SDR PWB is defective, replace it.

Each buffer IC has a set of two of these SMD capacitors, from Ics Vcc to ground.

Model Upper SDR PWB Lower SDR PWB

P42H401, H4011, T501, A and Non A
P50H401, H4011, T501
P50H401

, H4011A, T501

FPF39R-SDR57141 FPF39R-SDR57142

FPF47R-SDR60806FPF47R-SDR60796

FPF46R-SDR61221 FPF46R-SDR61231
P55H401, H4011, T551 FPF47R-SDR60796 FPF47R-SDR60806
P60X901

Note: Mixing P50H401 and P50H401

SDRs will cause an unusual (distorted) picture.

FPF35R-SDR54912 FPF35R-SDR54922

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